uvm_fault(fffffd806c818988,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80002a3c7220,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a3c7220) at usertrap+0x40f sys/arch/amd64/amd64/trap.c:494
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x72c20620f560, count: -21
ddb{0}> machine ddbcpu 1
Stopped at      savectx+0xae:   movl    $0,%gs:0x688
savectx() at savectx+0xae
end of kernel
end trace frame: 0xf0e14fd7890, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0xf0e14fd7890, count: -1